Nokea
Which of the following tissues secrete proteolytic enzymes to liquefy semen?
- A. bulbourethral gland
- B. urethra
- C. prostate
- D. testis
Correct Answer: C
Rationale: The correct answer is C: prostate. The prostate gland secretes proteolytic enzymes such as prostate-specific antigen (PSA) to liquefy semen. This aids in sperm mobility and overall fertility. The other choices are incorrect because:
A: bulbourethral gland secretes a clear fluid to lubricate the urethra during sexual arousal.
B: urethra is a passageway for urine and semen but does not secrete proteolytic enzymes.
D: testis produces sperm cells but does not secrete enzymes to liquefy semen.
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The normal site of fertilization is:
- A. the uterus
- B. the vagina
- C. the ureter
- D. the oviduct
Correct Answer: D
Rationale: The correct answer is D: the oviduct. Fertilization occurs in the oviduct, specifically in the ampulla region. Sperm meets the egg in the oviduct where fertilization takes place. The other choices, A: the uterus, B: the vagina, and C: the ureter, are incorrect because fertilization does not occur in these locations. The uterus is where the fertilized egg implants and develops into a fetus. The vagina is the passage for sperm to enter the reproductive system. The ureter is a tube that connects the kidney to the bladder, and is not involved in fertilization.
Which gland produces thick, clear mucus that cleanses the penile urethra of acidic urine?
- A. Testes
- B. Seminal vesicles
- C. Prostate
- D. Bulbourethral glands
Correct Answer: D
Rationale: The correct answer is D: Bulbourethral glands. These glands produce thick, clear mucus that cleanses the penile urethra of acidic urine before ejaculation. This mucus helps neutralize the acidity of urine, creating a more hospitable environment for sperm to travel through. The other choices are incorrect because:
A: Testes produce sperm, not mucus.
B: Seminal vesicles produce a fluid rich in fructose to nourish sperm.
C: Prostate produces a milky fluid that aids in sperm motility.
What effect does luteinizing hormone uterine (fallopian) tubes is called the (LH) have on a female?
- A. LH promotes enlargement of
- B. body the female's breasts.
- C. fundus
- D. LH has no effect on a femal
Correct Answer: D
Rationale: Rationale:
1. LH is a hormone released by the pituitary gland.
2. Its main role in females is to trigger ovulation.
3. LH does not directly affect the uterine tubes or breast enlargement.
4. Therefore, the correct answer is D: "LH has no effect on a female."
Summary:
A, B, and C are incorrect because LH does not promote breast enlargement or affect the uterine tubes. The correct answer, D, is supported by the physiological functions of LH in the female reproductive system.
What is the source and function of HCG?
- A. uterus; cause labor
- B. ovary; stimulates FSH
- C. placenta; inhibits LH
- D. placenta; mimics LH
Correct Answer: D
Rationale: The correct answer is D: placenta; mimics LH.
Rationale:
1. HCG (Human Chorionic Gonadotropin) is produced by the placenta during pregnancy.
2. HCG mimics the action of LH (Luteinizing Hormone) to support the corpus luteum in producing progesterone.
3. This helps maintain the uterine lining and supports the pregnancy.
Summary:
A: Incorrect - Uterus does not produce HCG, and it does not cause labor.
B: Incorrect - Ovary does not produce HCG, and it does not stimulate FSH.
C: Incorrect - Placenta produces HCG, but it does not inhibit LH; instead, it mimics LH's actions.
Where does the epididymis direct sperm cells into?
- A. vas efferens
- B. vas deferens
- C. rete testis
- D. prostate gland
Correct Answer: B
Rationale: The epididymis directs sperm cells into the vas deferens. Sperm mature in the epididymis and are stored there until ejaculation. The vas deferens then carries the mature sperm from the epididymis to the urethra for ejaculation. The other choices are incorrect because the vas efferens carries sperm from the rete testis to the epididymis, the rete testis is a network of tubules where sperm is collected from the seminiferous tubules, and the prostate gland secretes fluids that contribute to semen but does not direct sperm flow.